| 摘要 |
PURPOSE:To facilitate recognition of an abnormal power supply section by providing a first means for detecting the output voltage from a DC stabilized power supply and a second means for detecting the voltage at a power receiving section and then comparing the outputs from the first and second means with a preset value. CONSTITUTION:Upon rising of a DC stabilized power supply 1, a microprocessor 8 monitors the output voltage from the DC stabilized power supply 1 and the voltage at a power receiving section 2 through A/D converting circuits 5, 6. At that time, a preset value is read out from the memory section 9 of the microprocessor 8 and compared with the monitored voltages. If the output voltage from the DC stabilized power supply 1 is lower than the set value, output from the DC stabilized power supply 1 is judged abnormal. When the difference of voltage between the DC stabilized power supply 1 and the power receiving section 2, i.e., the voltage drop of a feeder line 3, is higher than the set value, the feeder line 3 is judged abnormal. The error information is written into the memory section 9. |
